JPH1060317A - Elution-free antifouling method and elution-free antifouling coating composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elution-free antifouling method which can provide a persistent antifouling effect without adversely affecting the environment and an elution-free antifouling coating composition used therefor. SOLUTION: This antifouling method comprises applying an elution-free antifouling coating composition consisting of at least two resins incompatible with each other and insoluble in seawater to the outermost layer of a submerged part of an undersea structure and curing it, thus coating the layer with a cured film of such a microscopically nonuniform structure that particulate or disc-like minute projections comprising at least one of the resins and having a mean particle diameter of 10nm to 20μm account for 5-49% of the surface area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a non-eluting type antifouling method and a non-eluting type antifouling paint composition.

[0002]

2. Description of the Related Art Structures that come into contact with seawater, such as ships, marine structures, fishing nets for aquaculture, buoys, and industrial water systems, are constantly exposed to the water in which living organisms inhabit. , Bacteria, diatoms and other microorganisms adhere to it, and even larger attached organisms such as barnacles, mussels,
Animals and plants such as Aosa attach. If the surface of structures or the like in contact with seawater is covered by these, corrosion of the relevant parts, decrease in ship fuel efficiency due to increase in seawater frictional resistance at the bottom of the ship, mass death of fish and shellfish due to clogging of fishing nets and work Damage such as sinking due to reduced efficiency and reduced buoyancy of the buoy will occur.

[0003] As a method of preventing the adhesion of these pests, a method of applying an antifouling paint has conventionally been adopted. As such an antifouling paint, a hydrolysis-type antifouling paint using a trialkyltin-containing polymer as an antifouling component is used. In this antifouling paint, the trialkyltin-containing polymer is hydrolyzed in a slightly alkaline atmosphere in seawater to elute the organic tin compound, and the paint vehicle is made water soluble, and the compounded antifouling agent is eluted to prevent the antifouling paint. Although an elutriation effect is obtained, the eluted organotin compound is highly toxic and harmful to ecology, so it is necessary to take an ecologically safe antifouling measure from the viewpoint of environmental pollution.

[0004] Silicone rubber coatings are well known as being capable of obtaining an antifouling effect without eluting an antifouling agent or other components. This silicone rubber coating film has both water repellency, elasticity and other properties, and exhibits an antifouling effect by utilizing these properties. However, since such a coating film is attacked by microorganisms very early after immersion in seawater and loses water repellency,
Thereafter, the attachment of aquatic organisms proceeds rapidly.

Various proposals have been made in order to maintain water repellency and increase the durability of the antifouling effect. For example, JP-A-53-79980 discloses a method in which a vulcanized silicone rubber contains an organic compound containing no silicone or metal, such as liquid paraffin. JP-B-56-26272 discloses a method in which silicone rubber contains a silicone oil having a molecular weight of about 2,000 to 30,000. Japanese Patent Publication No. 60-3433 discloses a method of adding a low critical surface tension substance of a petroleum fraction such as petrolatum to silicone rubber. JP-A-54-26826 and JP-B-57-16868 disclose methods of blending various thermoplastic resins or polyvinyl butyral resins with silicone rubber. However, it has been difficult for these technologies to maintain the antifouling effect for a long time.

Japanese Patent Application Laid-Open No. 7-328523 discloses that a resin film is composed of fine particles having at least a hydrophobic surface and having an average particle diameter of 1 nm to 1 mm and a resin coating film.
A water-repellent coating fixed to a region of 0% or more is disclosed. However, in this technique, when the resin is in an uncured state or a semi-cured state when forming a coating film, the fine particles are adhered, so when used in water for a long time,
There is a problem that the water repellency of the coating is impaired due to the fine particles coming off the coating.

[0007]

SUMMARY OF THE INVENTION In view of the above, the present invention provides a non-elutable antifouling method capable of maintaining an antifouling effect for a long period of time without adversely affecting the environment, and a non-elutable antifouling method used therefor. An object of the present invention is to provide an antifouling paint composition.

[0008]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have focused on the state of the surface of the coating film which comes into contact with seawater and made intensive studies. On the surface of the coated film, at least one of the resins that are insoluble in seawater contained in the antifouling coating composition forms minute or disk-shaped projections having an average particle diameter of 10 nm to 20 μm. However, it has been found that by occupying 5 to 49% of the surface area, the antifouling effect is exhibited without eluting the antifouling component, and the present invention has been completed.

That is, the gist of the present invention is to provide a non-elutable antifouling paint composition comprising at least two types of resins that are incompatible with each other and insoluble in seawater on the outermost layer of the submerged seawater portion of the structure. Is applied and cured to form an outermost layer having a micro-nonuniform structure in which at least one of the above-mentioned resins has a particle or disk-shaped fine projection having an average particle diameter of 10 nm to 20 μm and a surface area of 5 to 49%. It is a non-elution type antifouling method of coating with a cured coating film.

[0010] Further, the gist of the present invention is that
It is composed of at least two kinds of resins insoluble in seawater, and has an average particle size of at least one of the above resins of 10 nm to
A non-eluting antifouling coating composition capable of forming a cured coating film having a micro-uniform structure having 20 μm granular or disc-shaped fine projections, wherein the cured coating film has a surface area of 5%.
４９49% is composed of fine particles or disc-shaped projections having an average particle diameter of 10 nm to 20 μm, and the resin is dissolved or suspended in a solvent. After coating and drying, the resin has an average particle diameter of 10 nm to 20 μm. A non-eluting antifouling coating composition capable of forming a cured coating film having a micro-uniform structure having fine particles or disk-shaped fine projections.

Further, the gist of the present invention is that the above-mentioned non-elutable antifouling paint composition is applied to an object to be coated and cured to obtain an average particle size of 1%.
Finely divided particles or discs having a size of 0 nm to 20 μm are present in a cured coating film having a micro heterogeneous structure in which 5 to 49% of the surface area is occupied. Hereinafter, the present invention will be described in detail.

In the non-elution type antifouling method of the present invention, the non-elution type antifouling resin comprising at least two types of resins which are incompatible with each other and insoluble in seawater is provided on the outermost layer of the submerged portion of the structure. The soil paint composition is applied and cured, and the outermost layer is coated with the cured coating film. The structure is not particularly limited, and examples thereof include a ship bottom, a fishing net for aquaculture, a fishing net for a fixed net, and a buoy; a cooling water channel of a factory, a thermal power plant, a nuclear power plant, and the like.

The non-elutable antifouling paint composition applied on the outermost layer of the submerged seawater portion of the above structure is composed of at least two kinds of resins which are incompatible with each other and insoluble in seawater. Examples of the resin insoluble in seawater include the following two groups, and at least one resin can be selected for each. The first group includes reaction-curable resins such as polybutadiene rubber, one-component curable silicone rubber, one-component curable epoxy resin, and urethane elastomer, and dry-curable resins cured by solvent volatilization. The second group includes dry-curable resins such as acrylic resins, styrene resins, vinyl chloride resins, polyoxyethylene-silicone block resins, and silicone-grafted acrylic resins.

In the present invention, by mixing at least two kinds of resins which are insoluble in seawater among the resins which are insoluble in each other, a granular or disc-shaped resin is formed on the outermost layer of the submerged portion of the seawater structure. A cured coating film having a micro heterogeneous structure having minute projections can be formed. In the present specification, a cured coating having a micro heterogeneous structure is not macroscopically separated into respective resins when two or more resins having contrasting properties are mixed and formed into a film. Microscopically, microscopic domains formed by the aggregation of similar components are randomly appearing on the surface, with a large amount of components forming a continuous phase and a minority component forming a so-called sea-island structure of a dispersed phase. Say.

The average particle size of the fine granular or disk-shaped projections is 10 nm to 20 μm. If it is less than 10 nm, it does not become granular or disk-shaped projections, and the micro-inhomogeneous structure on the surface is not sufficient. If it exceeds 20 μm, the projections are too large to serve as a scaffold for the attachment of aquatic organisms. Therefore, it is limited to the above range.

In the non-elutable antifouling method according to the present invention, the non-elutable antifouling paint composition comprising at least two kinds of resins which are incompatible with each other and insoluble in seawater is prepared by submerging the non-elutable antifouling paint composition in the seawater submerged portion of the structure. Is applied to the outermost layer and cured, and the outermost layer is covered with a cured coating film having a micro heterogeneous structure in which fine projections having a mean particle size of 10 nm to 20 μm and having a surface area of 5 to 49% are provided with fine projections of 5 to 49%. I do.

The fine protrusions having a mean particle size of 10 nm to 20 μm, which are granular or disk-shaped, account for 5 to 49% of the total surface area of the cured coating film. If it is less than 5%, the anti-fouling effect cannot be obtained because the micro-uneven structure on the surface is insufficient, and if it exceeds 49%, the projections are too many and serve as a scaffold for the attachment of underwater organisms. Therefore, it is limited to the above range. Preferably, it is 5-35%.

In the non-elution type antifouling method of the present invention, the average particle size of 10 nm to 20 μm is formed on the outermost layer of the submerged portion of the structure in seawater.
The coating is performed by coating with a cured coating film having m or granular small protrusions, and the surface of the cured coating film, which is the seawater contact surface, has a micro-uneven structure to adhere to underwater organisms. Etc. can be prevented. In the non-elution type antifouling method of the present invention, the cured coating film is macroscopically uniform, does not change in seawater, and can maintain the structure of the coating film at the time of curing. The antifouling effect can be obtained stably for a long time.

The non-eluting antifouling paint composition of the present invention comprises at least two resins which are incompatible with each other and insoluble in seawater, and has an average particle diameter of at least one of the above resins of 10 nm to 20 μm. A non-eluting antifouling paint composition capable of forming a cured coating film having a micro-uniform structure having granular or disk-shaped fine projections, wherein 5 to 49% of the surface area of the cured coating film is , The average particle size of 10 nm to 20
μm granular or disk-shaped fine projections, the resin is dissolved or suspended in a solvent, after coating and drying,
The cured coating film having a micro-uniform structure having fine particles or disc-shaped fine projections having an average particle diameter of 10 nm to 20 μm can be formed.

The non-elutable antifouling coating composition of the present invention comprises at least two resins which are incompatible with each other and insoluble in seawater. The resin insoluble in seawater is not particularly limited, and examples thereof include those described in the non-elutable antifouling method. In the present invention, the resin is
Each solubility parameter (SP) value is 12.5 [c
al / cm ³ ] less than ^1/2 . 12.
If it is 5 [cal / cm ³ ] ^1/2 or more, remarkable swelling or dissolution occurs in seawater, which is inappropriate. The SP value can be measured by a so-called solvent spectrum method.

Specifically, for example, for 1 to 2 g of resin,
An appropriate amount of solvent is added, and it is checked whether the resin is soluble in the added solvent. The solvent may be any solvent that constitutes a solvent spectrum in which the SP value increases irrespective of the chemical structure, and is appropriately selected and used. As the solvent constituting the solvent spectrum, for example, "Polymer Handbook (POLYMER HANDBOOK)"
[J. Brandrup,
EH Immergut
t) ed .; John Wiley and Sands (John)
Wiley &Sons); 1989) VII / 5
Examples thereof include those described in Table 2.1 on page 23. Of the above solvents, those in which the resin is soluble
The middle point of the range of the P value is defined as the SP value of the resin.

Among the resins that are insoluble in seawater, acrylic resins, styrene resins, and the like, which form minute or disk-like projections having an average particle size of 10 nm to 20 μm,
It is preferable to use a dry-curable resin, such as a vinyl chloride resin, a polyoxyethylene-silicone block resin, or a silicone-grafted acrylic resin, which is cured by solvent volatilization. In the present invention, it is most preferable to use a silicone-grafted acrylic resin.

Among the resins that are insoluble in seawater, resins other than the resin that forms the granular or disk-shaped minute projections having an average particle diameter of 10 nm to 20 μm include polybutadiene rubber, one-component curable silicone rubber, It is preferable to use a reaction curable resin such as a liquid curable epoxy resin or a urethane elastomer, or a dry curable resin. In the present invention, since the SP value of the reaction-curable resin cannot be measured after the reaction, the resin before the reaction is used.

[0024] The compounding ratio of the resin forming the above-mentioned granular or disk-shaped fine projections is preferably less than 50% by weight. 50
If the content is more than 10% by weight, there is a problem that fine particles or disc-shaped projections are not formed and the strength of the coating film is reduced. The lower limit is not particularly limited as long as it is within a range in which the granular or disk-like minute projections can be formed. Preferably, it depends on the difference in specific gravity of the resin used.
% By weight or more.

The resin forming the granular or disk-shaped minute projections and the resin other than the resin forming the granular or disk-shaped minute projections have a solubility parameter (SP) of both.
The difference in the values is preferably from 0.3 to 4 [cal / cm ³ ] ^1/2 .

The difference between the SP values is 0.3 [cal / cm].
³ ] If it is less than ^1/2 , the above resins are mutually compatible, and the cured coating film does not have a microscopically non-uniform structure, but becomes uniform and smooth, so that underwater organisms adhere. It will be easier.
On the other hand, when it exceeds 4 [cal / cm ³ ] ^1/2 , there is almost no interaction between the above two kinds of resins, so that the resins are completely separated from each other, causing phase separation.
The above-mentioned phase separation means that when two or more resins having contrasting properties are mixed and formed into a film, the resins having the same properties assemble by molecular motion to form a film with each resin alone. It refers to a state where similar parts are repeated. In this state, the strength of the coating film at the boundary between the respective resins is weak, and the structure and strength of the structure as a coating film after curing cannot be maintained.

The resin other than the resin forming the granular or disk-shaped minute protrusions and the resin other than the resin forming the granular or disk-shaped minute protrusions may have a difference in specific gravity of 0.3 or less. preferable. If it exceeds 0.3, layer separation occurs vertically during the formation of the film, and it is not possible to form fine granular or disk-shaped projections having an average particle size of 10 nm to 20 μm.

In the non-eluting antifouling paint composition of the present invention, the film thickness of the obtained coating film is three times or more the average particle size of the granular or disk-like fine projections formed on the coating film surface. Preferably, there is. Even if the film thickness is less than three times the average particle size of the granular or disk-shaped minute projections, a coating film having a micro-uneven structure can be obtained. Alternatively, it is difficult to hold the disk-shaped minute projection in seawater for a long period of time. The thickness is specifically 5
It is preferably at least 0 μm.

The non-eluting antifouling paint composition of the present invention contains a known antifouling agent, bactericide, antialgae agent, silicone oil, or the like, as long as the formation of the above-mentioned granular or disk-shaped minute projections is not hindered. A water repellency-imparting agent such as paraffin or petrolatum may be added for the purpose of reinforcing antifouling performance.

The non-eluting antifouling coating composition of the present invention is applied to a substrate to be coated, dried and cured to form fine particles or disc-shaped projections having an average particle size of 10 nm to 20 μm on the surface. It is possible to form a cured coating having a micro-uneven structure occupying a surface area of ~ 49%. This cured coating film having a micro heterogeneous structure is also one of the present invention.

In the present invention, by forming the above-mentioned cured coating film on the outermost layer of the seawater submerged portion of the structure, the seawater contact surface has a micro-uneven structure, and it is possible to prevent the adhesion of underwater organisms. . The reason why the specific effects of the present invention are exhibited is not necessarily clear, but can be considered as follows.

First, as a physical reason, since the cured coating film has fine particles or disc-like projections having an average particle diameter of 10 nm to 20 μm, the cured coating film serves as a scaffold for the attachment of organisms in water. Because there is no water, it is considered that underwater organisms are difficult to attach.

Second, the chemical and biological reasons may be due to the mechanism of adhesion of underwater organisms. For the attachment of aquatic organisms, first, after recognizing the substrate to be attached, the adhesive component is released to the surface of the substrate and adheres. In the process of such attachment, there is an idea that substrate recognition and attachment are performed at the cellular level, and whether or not an underwater organism easily attaches depends on the foreign matter recognition process of cells in a living body. It is believed that. When cells in a living body release an adhesive component on the substrate surface, the release state of the adhesive component changes the aggregation state and fluidity of the proteins and lipids that make up the cell membrane, and the change is stimulated and transmitted to the inside of the cell. It is thought that activation such as morphological change and release of intracellular substances is caused.

When a cell comes into contact with the surface of a substrate consisting of a single component in which functional groups are uniformly distributed on the surface, cell membrane components that strongly interact with the functional group are distributed at a high density at the contact surface between the substrate and the cell. Then, foreign object recognition occurs. On the other hand, on the surface on which different types of functional groups are unevenly distributed, that is, on the surface of the cured coating film having a micro-uneven structure, different types of cell membrane components are aggregated according to each functional group.
Aggregates of the same type of membrane protein over a wide area are hardly formed at the contact surface between the substrate and the cell, and the cell membrane is in a state close to that at the time of non-contact, stimulus transmission to the inside of the cell is inhibited, and the cell does not recognize foreign substances . Therefore, it is considered that the adhesion of underwater organisms is controlled.

In the present invention, the average particle size is 10 nm to 2 nm.
0 μm granular or disk-shaped minute projections have a surface area of 5 to 5 μm.
Since the surface of the cured coating, occupying 49%, is the same as the surface on which the different types of functional groups are unevenly distributed as described above, it can be considered that the adhesion of underwater organisms is controlled.

[0036]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Production Example 1 Silicone Graft Acrylic Tree
35 parts by weight of toluene was charged into a polymerization reaction vessel equipped with a stirrer and a temperature controller for the production of fat, and the temperature was maintained at 105 ° C. A solution in which 23 parts by weight of methyl methacrylate, 9 parts by weight of 2-ethylhexyl acrylate, 18 parts by weight of a silicone macromonomer represented by the following formula (I), and 0.7 parts by weight of benzoyl peroxide were previously mixed at room temperature was added to the above reaction vessel. While stirring, the mixture was dropped at a constant volume for 3 hours while keeping the temperature at 105 ° C.
After the completion of the dropwise addition, the mixture was kept under stirring and warming for 30 minutes, and then a mixture of 15 parts by weight of toluene and 0.1 part by weight of benzoyl peroxide was dropped in a constant volume in the same manner for 30 minutes. After dropping,
After maintaining the stirring and warming state for 2 hours, the mixture was cooled to room temperature. The silicone acrylic resin thus obtained was a varnish having a 50% concentration of toluene, and had a viscosity of 100 centipoise and a molecular weight of about 29000. The SP value is 10.2 [cal
/ Cm ³ ] ^1/2 and the specific gravity was 1.15.

[0038]

Embedded image

Example 1 Room temperature moisture-curable silicone resin (KE4 manufactured by Shin-Etsu Chemical Co., Ltd.)
5TS, an SP value of 9.2 [cal / cm ³ ] ^1/2 , a specific gravity of 1.04) was 94 parts by weight in terms of solids, and the silicone-grafted acrylic resin produced in Production Example 1 was 6 parts in terms of solids.
By weight, 100 parts by weight of toluene and 100 parts by weight of toluene were dispersed and coated with a high-speed homodisper to obtain a test coating. The difference between the SP values of the used reaction-curable resin and the dry-curable resin was as follows.
0 [cal / cm ³ ] ^1/2 , and the difference in specific gravity was 0.11. Example 2 Room temperature moisture-curable silicone resin (KE4 manufactured by Shin-Etsu Chemical Co., Ltd.)
5TS) in terms of solid content of 90 parts by weight, and the silicone-grafted acrylic resin produced in Production Example 1 was converted to solid content of 10 parts by weight.
A test paint was obtained in the same manner as in Example 1 except that the parts by weight and 100 parts by weight of toluene were used. Example 3 Room temperature moisture-curable silicone resin (KE4 manufactured by Shin-Etsu Chemical Co., Ltd.)
5TS) in terms of solid content, and 70 parts by weight of the silicone graft acrylic resin produced in Production Example 1 in terms of solid content of 30 parts by weight.
A test paint was obtained in the same manner as in Example 1 except that the parts by weight and 100 parts by weight of toluene were used.

Comparative Example 1 Room temperature moisture-curable silicone resin (KE4 manufactured by Shin-Etsu Chemical Co., Ltd.)
5TS) in terms of solids, 98 parts by weight in terms of solids, the silicone-grafted acrylic resin produced in Production Example 1 in terms of 2 parts by weight in terms of solids, and 100 parts by weight of toluene. Was. Comparative Example 2 Room temperature moisture-curable silicone resin (KE4 manufactured by Shin-Etsu Chemical Co., Ltd.)
5TS) in terms of solid content of 50 parts by weight, and the silicone-grafted acrylic resin produced in Production Example 1 in an amount of 50 in terms of solid content.
A test paint was obtained in the same manner as in Example 1 except that the parts by weight and 100 parts by weight of toluene were used.

Evaluation results 1. Observation result of surface microstructure Each test paint of Examples 1 to 3 and Comparative Examples 1 and 2 was 10 mm ×
Dry film thickness of 100 μm on a glass plate of 10 mm x 1 mm
After drying at room temperature for one week, the surface microstructure was observed with an atomic force microscope (SPI3700, manufactured by Seiko Instruments Inc.). The results are shown in FIGS.

2. Antifouling test results Each of the test paints of Examples 1 to 3 and Comparative Examples 1 and 2 was 300 mm.
Painted on a 100mm x 2mm hard vinyl chloride plate to a dry film thickness of about 100μm, dried for 1 week at room temperature, then dripped from a marine raft off the coast of Tamano City, Okayama Prefecture at a depth of about 1m to investigate the antifouling properties did. The results are shown in Table 1.

[0043]

[Table 1]

[0044]

Since the non-elutable antifouling method and the non-elutable antifouling coating composition of the present invention have the above-mentioned constitution, the components contained in the coating composition are not eluted into seawater for a long time. A coating film capable of maintaining the antifouling effect can be formed on a structure, and can be suitably used for a seawater contact surface such as a cooling water channel of a thermal power plant or a nuclear power plant.

[Brief description of the drawings]

1 is an atomic force micrograph of the surface of a coating film obtained from the antifouling coating composition of Example 1. FIG.

FIG. 2 is an atomic force micrograph of the surface of a coating film obtained from the antifouling coating composition of Example 2.

FIG. 3 is an atomic force micrograph of the surface of a coating film obtained from the antifouling coating composition of Example 3.

FIG. 4 is an atomic force micrograph of the surface of a coating film obtained from the coating composition of Comparative Example 1.

5 is an atomic force micrograph of the surface of a coating film obtained from the coating composition of Comparative Example 2. FIG.

Claims (10)

[Claims] 1. A non-elutable antifouling paint composition comprising at least two resins which are incompatible with each other and insoluble in seawater, are applied and cured on the outermost layer of a submerged seawater portion of a structure, The outermost layer is coated with a cured coating film having a micro-uniform structure in which minute projections of at least one of the resins having an average particle diameter of 10 nm to 20 μm and having a surface area of 5 to 49% are formed by fine projections of 5 to 49%. A non-eluting antifouling method characterized by the following. 2. Fine or disk-shaped fine projections having an average particle diameter of 10 nm to 20 μm have a surface area of 5 to 35 μm of the cured coating film.
The non-eluting type antifouling method according to claim 1, wherein the antifouling method is used. 3. A resin comprising at least two kinds of resins which are incompatible with each other and insoluble in seawater, and have at least one kind of the above-mentioned resins having fine granular or disk-shaped projections having an average particle diameter of 10 nm to 20 μm. A non-elutable antifouling coating composition capable of forming a cured coating film having a micro-heterogeneous structure, wherein 5 to 49% of the surface area of the cured coating film is in the form of particles having an average particle size of 10 nm to 20 μm or The resin is composed of minute protrusions in a disk shape, and the resin is present in a state of being dissolved or suspended in a solvent, and after coating and drying, has a micro heterogeneous structure having fine particles or disk-like protrusions having an average particle diameter of 10 nm to 20 μm. 2. A non-eluting antifouling coating composition for use in the non-eluting antifouling method according to claim 1, which is capable of forming a cured coating film. 4. The non-eluting antifouling paint composition according to claim 3, which can form a cured coating film at room temperature. 5. The non-eluting type antifouling paint composition according to claim 3, wherein the resin forming fine projections in the form of particles or discs having an average particle size of 10 nm to 20 μm is a dry-curable resin which is cured by evaporation of a solvent. . 6. The non-eluting antifouling paint composition according to claim 5, wherein the resin forming the fine particles or the disk-shaped protrusions having an average particle size of 10 nm to 20 μm is a silicone-grafted acrylic resin. 7. The resin according to claim 3, wherein the resin other than the resin that forms the fine protrusions having a particle diameter or a disk shape having an average particle diameter of 10 nm to 20 μm is a reaction-curable resin or a dry-curable resin that is cured by volatilization of a solvent. Non-eluting antifouling paint composition. 8. The compounding ratio of a resin which forms minute projections in the form of particles or discs having an average particle diameter of 10 nm to 20 μm is 50%.
The non-elutable antifouling paint composition according to claim 3, which is less than about 10% by weight. 9. A resin other than the resin that forms the granular or disk-shaped fine projections having an average particle diameter of 10 nm to 20 μm, and the resin other than the resin that forms the granular or disk-shaped fine projections having the average particle diameter of 10 nm to 20 μm. the solubility difference between the parameter value is ^{0.3~4 [cal / cm 3] 1/2} , non-eluting antifouling paint according to claim 3, wherein the difference in specific gravity is not less than 0.3 Composition. 10. A non-elutable antifouling coating composition according to any one of claims 3 to 9, which is applied to an object to be coated and cured to form a fine particle or disk having an average particle diameter of 10 nm to 20 μm. A cured coating film having a micro-uniform structure, wherein the projections occupy 5 to 49% of the surface area.